President Richard Nixon believed that North Vietnam was transporting troops and supplies through neighboring Cambodia into South Vietnam.
Answer:D. all of the above
Explanation:Isabella and Ferdinand are known for completing the Reconquista, ordering conversion of the Jews and Muslims from Spain, and for supporting and financing Christopher Columbus's 1492 voyage that led to the rediscovery of the New World by Europeans and to the establishment of Spain as a major power in Europe and much of the world for more than a century.
He recreated the laws, and he created a code of law for the empire.
I think it might be d but please let me know if it is right